Wheel On Suspension And Four-Wheel String Alignment System

Fast, Accurate, And Repeatable Four-Wheel Alignment

Now you can have a truly repeatable four-wheel alignment system designed specifically for race cars. The patented Wheel On system eliminates the variables found when using the molded rubber tire for lateral location and rear thrust angle found in most operations. With the entire vehicle weight on the wheels, simply bolt the adapters to the wheels and run a string front to back over the “T-bars” to check caster, camber, toe, front and rear lateral location, rear thrust angle or lead; you can also look for bent axle tubes, rear camber, and bumpsteer. Separate dials measure 6 degrees camber, each way, and 8 degrees caster. In addition, the easy-to-use T-bar design and dual dial indicators make adjustments fast.

Designed to AlignThe T-bars have a notch, front and rear, that the string lays in, which is used for aligning the hub faces. Spacers can be used if you are trying to line up the tire patches without hindering accuracy. Each T-bar is 20 inches long and can stay on the car when rolling it back and forth for toe checks. The black alignment posts on the rear axle are used for different offsets (when the rear width differs from the front). The alignment posts are marked using the string notch as 0 and go in or out 3 inches. When aligning a new chassis or checking for damage, the T-bars are placed outside the body of the race car to permit accurate alignment without the wheels on the car. This allows you to set up a truly race-ready car before you put it on the trailer and head for the track.

Setting Bumpsteer With Wheel OnBump-check operations require moving the chassis up and down, and this is easily handled with an ordinary 4-ton shop port-a-power. The patented Wheel On adapters slip on a port-a-power, and the port-a-power then replaces the car’s shock absorber so it can be used to raise and lower the chassis. This allows you to check the bump at any height. Bump is measured with double-dial indicators for continuous accuracy, and it can be double-checked by leaving the string on the four-wheel-alignment T-bars. If your vehicle has weight jacks, the jacks can be run up and down to move the chassis instead of replacing the shock, or the spring can be removed and a simple floor jack used. Also, two or more port-a-powers can be used to simulate chassis angle or attitude, and the wheels can be turned to simulate cornering. This system is the only one that lets you set bumpsteer with the vehicle weight on the tires, which preloads the front end much like the car would sit on a racetrack surface.

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